25320560 has 20 divisors (see below), whose sum is σ = 58870488. Its totient is φ = 10128192.

The previous prime is 25320553. The next prime is 25320563. The reversal of 25320560 is 6502352.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×25320560² = 1282261517427200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25320563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158174 + ... + 158333.

Almost surely, 2^25320560 is an apocalyptic number.

25320560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25320560 is an abundant number, since it is smaller than the sum of its proper divisors (33549928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25320560 is a wasteful number, since it uses less digits than its factorization.

25320560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316520 (or 316514 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25320560 is about 5031.9538948603. The cubic root of 25320560 is about 293.6462340602.

The spelling of 25320560 in words is "twenty-five million, three hundred twenty thousand, five hundred sixty".